An Interaction Of A Sonic Injection Jet With A
Supersonic Turbulent Flow Approaching A
Re-entry Vehicle To Atmosphere
Author(s)
D. Sun & R. S. Amano
Abstract
A shock-interaction flow field generated by transverse sonic injection into a
supersonic flow was simulated by solving the Favre-averaged Navier-Stokes
equations using the weighted essentially non-oscillatory (WENO) schemes.
Three-dimensional results indicate that there appear four pairs of vortices around
the secondary injection. In the upstream of the square injection there exist two
main recirculation regions and the primary vortex induces the horseshoe vortex
region. After the secondary injection flow ejects from the square hole, it is forced
by the supersonic main flow and then it becomes a pair of counter rotation
vortices towards downstream. In the downstream there is a low-pressure region
that conduces a pair of helical vortices.
Keywords: supersonic flow, bow shock wave, horse-shoe vortex, CFD.
1 Introduction
Shock-interaction flowfield generated from a sonic gaseous flow injected
transversely into a supersonic freestream is encountered in practical applications
such as space shuttle reentry atmosphere, rocket motor thrust vector control
systems, supersonic combustion, high-speed flight vehicle reaction control jets,
and gas-turbine cooling systems [1-3]. One example is the case when re-entry
vehicles or reusable rockets enter atmosphere, its attitude has to be controlled to
endure large aerodynamic heating. Because of a high angle of attack on
re-entering, the flow separates from the control surface. If the jet is injected into
a hypersonic flow, complicated interaction between the jet and the flow occurs. It
results in boundary layer separation, shock waves, and vortices, which are
Keywords
supersonic flow, bow shock wave, horse-shoe vortex, CFD.
Related Book
Other papers in this volume
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